Preheat oven to 325 degrees F. In a small bowl, combine melted butter, the chili powder, lime juice, and garlic salt. In a 15x10x1-inch baking pan, combine butter mixture and nuts. Toss to coat evenly.
Bake for 15 minutes, stirring twice. Spread nuts on a large piece of foil to cool. Store in an airtight container at room temperature for up to 2 weeks or freeze up to 3 months.